ChakraCore/bin/ch/DbgController.js

//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------

var TRACE_NONE = 0x0000;
var TRACE_COMMANDS = 0x001;
var TRACE_DIAG_OUTPUT = 0x002;
var TRACE_INTERNAL_FUNCTIONS = 0x004;
var TRACE_DEBUG_EVENTS = 0x008;
var TRACE_ALL = TRACE_COMMANDS | TRACE_DIAG_OUTPUT | TRACE_INTERNAL_FUNCTIONS | TRACE_DEBUG_EVENTS;

// Have all JsDiag* functions installed on it by Debugger.cpp
var hostDebugObject = {};

var controllerObj = (function () {
    var _commandList = [];
    var _commandCompletions = [];
    var _wasResumed = false;
    var _currentStackFrameIndex = 0;
    var _trace = TRACE_NONE;
    var _eventLog = [];
    var _baseline = undefined;
    var _exceptionCommands = undefined;
    var _onasyncbreakCommands = undefined;
    var _inspectMaxStringLength = 16;

    function internalPrint(str) {
        WScript.Echo(str);
    }

    function isTracing(traceFlag) {
        return _trace & traceFlag;
    }

    function internalTrace(traceFlag, ...varArgs) {
        if (isTracing(traceFlag)) {
            var str = "";
            varArgs.map(function (element) {
                str += (typeof element != "string") ? JSON.stringify(element, undefined, "  ") : element;
            });
            internalPrint(str);
        }
    }

    function printError(str) {
        internalPrint("Error: " + str);
    }

    function callHostFunction(fn) {
        var result = fn.apply(undefined, [].slice.call(arguments, 1));
        var obj = {};
        obj[fn.name] = result;
        internalTrace(TRACE_DIAG_OUTPUT, obj);
        return result;
    }

    filterLog = (function () {
        var parentFilter = { "this": 1, "locals": 1 };
        var filter = {};

        // Discard all known globals to reduce baseline noise.
        [
            "#__proto__",
            "NaN",
            "Infinity",
            "undefined",
            "eval",
            "parseInt",
            "parseFloat",
            "isNaN",
            "isFinite",
            "decodeURI",
            "decodeURIComponent",
            "encodeURI",
            "encodeURIComponent",
            "escape",
            "unescape",
            "CollectGarbage",
            "Object",
            "Array",
            "Boolean",
            "Symbol",
            "Proxy",
            "Reflect",
            "Promise",
            "Date",
            "Function",
            "Math",
            "Number",
            "String",
            "RegExp",
            "ArrayBuffer",
            "DataView",
            "Int8Array",
            "Uint8Array",
            "Uint8ClampedArray",
            "Int16Array",
            "Uint16Array",
            "Int32Array",
            "Uint32Array",
            "Float32Array",
            "Float64Array",
            "JSON",
            "Intl",
            "Map",
            "Set",
            "WeakMap",
            "WeakSet",
            "Error",
            "EvalError",
            "RangeError",
            "ReferenceError",
            "SyntaxError",
            "TypeError",
            "URIError",
            "WScript",
            "print"
        ].forEach(function (name) {
            filter[name] = 1;
        });

        function filterInternal(parentName, obj, depth) {
            for (var p in obj) {
                if (parentFilter[parentName] == 1 && filter[p] == 1) {
                    delete obj[p];
                } else if (typeof obj[p] == "object") {
                    filterInternal(p.trim(), obj[p], depth + 1);
                }
            }
        }

        return function (obj) {
            try {
                filterInternal("this"/*filter root*/, obj, 0);
            } catch (ex) {
                printError("exception during filter: " + ex);
            }
        };
    })();

    function recordEvent(json) {
        filterLog(json);
        _eventLog.push(json);
    }

    // remove path from file name and just have the filename with extension
    function filterFileName(fileName) {
        try {
            var index = fileName.lastIndexOf("\\");
            if (index >= 0) {
                return fileName.substring(index + 1);
            }
        } catch (ex) { }
        return "";
    }

    var bpManager = (function () {
        var _bpMap = [];
        var _locBpId = -1;

        function getBpFromName(name) {
            for (var i in _bpMap) {
                if (_bpMap[i].name === name) {
                    return _bpMap[i];
                }
            }
            printError("Breakpoint named '" + name + "' was not found");
        }

        function internalSetBp(name, scriptId, line, column, execStr) {
            var bpObject = callHostFunction(hostDebugObject.JsDiagSetBreakpoint, scriptId, line, column);
            return {
                id: bpObject.breakpointId,
                scriptId: scriptId,
                name: name,
                line: bpObject.line,
                column: bpObject.column,
                execStr: execStr,
                enabled: true
            };
        }

        function addBpObject(bpObj) {
            internalTrace(TRACE_INTERNAL_FUNCTIONS, "addBpObject: ", bpObj);
            _bpMap[bpObj.id] = bpObj;
        }

        return {
            setBreakpoint: function (name, scriptId, line, column, execStr) {
                var bpObj = internalSetBp(name, scriptId, line, column, execStr);
                addBpObject(bpObj);
            },
            setLocationBreakpoint: function (name, scriptId, line, column, execStr) {
                var bpObj = {
                    id: _locBpId--,
                    scriptId: scriptId,
                    name: name,
                    line: line,
                    column: column,
                    execStr: execStr,
                    enabled: false
                }
                addBpObject(bpObj);
            },
            enableBreakpoint: function (name) {
                var bpObj = getBpFromName(name);
                if (bpObj) {
                    delete _bpMap[bpObj.id];
                    internalTrace(TRACE_INTERNAL_FUNCTIONS, "enableBreakpoint: ", name, " bpObj: ", bpObj);
                    bpObj = internalSetBp(bpObj.name, bpObj.scriptId, bpObj.line, bpObj.column, bpObj.execStr);
                    addBpObject(bpObj);
                }
            },
            deleteBreakpoint: function (name) {
                var bpObj = getBpFromName(name);
                if (bpObj && bpObj.enabled) {
                    internalTrace(TRACE_INTERNAL_FUNCTIONS, "deleteBreakpoint: ", name, " bpObj: ", bpObj);
                    callHostFunction(hostDebugObject.JsDiagRemoveBreakpoint, bpObj.id);
                    delete _bpMap[bpObj.id];
                }
            },
            disableBreakpoint: function (name) {
                var bpObj = getBpFromName(name);
                if (bpObj && bpObj.enabled) {
                    internalTrace(TRACE_INTERNAL_FUNCTIONS, "disableBreakpoint: ", name, " bpObj: ", bpObj);
                    callHostFunction(hostDebugObject.JsDiagRemoveBreakpoint, bpObj.id);
                    _bpMap[bpObj.id].enabled = false;
                }
            },
            getExecStr: function (id) {
                for (var i in _bpMap) {
                    if (_bpMap[i].id === id) {
                        return _bpMap[i].execStr;
                    }
                }
                printError("Breakpoint '" + id + "' was not found");
            },
            setExecStr: function (id, newExecStr) {
                for (var i in _bpMap) {
                    if (_bpMap[i].id === id) {
                        _bpMap[i].execStr = newExecStr;
                    }
                }
            },
            clearAllBreakpoints: function () {
                _bpMap = [];
                _locBpId = -1;
            }
        }
    })();

    function addSourceFile(text, srcId) {
        try {
            // Split the text into lines.  Note this doesn't take into account block comments, but that's probably okay.
            var lines = text.split(/\n/);

            // /**bp            <-- a breakpoint
            // /**loc           <-- a named source location used for enabling bp at later stage
            // /**exception     <-- set exception handling, catch all or only uncaught exception
            // /**onasyncbreak  <-- set what happens on async break

            var bpStartToken = "/**";
            var bpStartStrings = ["bp", "loc", "exception", "onasyncbreak"];
            var bpEnd = "**/";

            // Iterate through each source line, setting any breakpoints.
            for (var i = 0; i < lines.length; ++i) {
                var line = lines[i];
                for (var startString in bpStartStrings) {
                    var bpStart = bpStartToken + bpStartStrings[startString];
                    var isLocationBreakpoint = (bpStart.indexOf("loc") != -1);
                    var isExceptionBreakpoint = (bpStart.indexOf("exception") != -1);
                    var isOnAsyncBreak = (bpStart.indexOf("onasyncbreak") != -1);

                    var startIdx = -1;
                    while ((startIdx = line.indexOf(bpStart, startIdx + 1)) != -1) {
                        var endIdx;
                        var currLine = i;
                        var bpLine = i;
                        var currBpLineString = "";

                        // Gather up any lines within the breakpoint comment.
                        do {
                            var currentStartIdx = 0;
                            if (currLine == i) {
                                currentStartIdx = startIdx;
                            }
                            currBpLineString += lines[currLine++];
                            endIdx = currBpLineString.indexOf(bpEnd, currentStartIdx);
                        } while (endIdx == -1 && currLine < lines.length && lines[currLine].indexOf(bpStartToken) == -1);

                        // Move the line cursor forward, allowing the current line to be re-checked
                        i = currLine - 1;

                        // Do some checking
                        if (endIdx == -1) {
                            printError("Unterminated breakpoint expression");
                            return;
                        }

                        var bpStrStartIdx = startIdx + bpStart.length;
                        var bpStr = currBpLineString.substring(bpStrStartIdx, endIdx);

                        var bpFullStr = currBpLineString.substring(startIdx, endIdx);

                        // Quick check to make sure the breakpoint is not within a
                        // quoted string (such as an eval).  If it is within an eval, the
                        // eval will cause a separate call to have its breakpoints parsed.
                        // This check can be defeated, but it should cover the useful scenarios.
                        var quoteCount = 0;
                        var escapeCount = 0;
                        for (var j = 0; j < bpStrStartIdx; ++j) {
                            switch (currBpLineString[j]) {
                                case '\\':
                                    escapeCount++;
                                    continue;
                                case '"':
                                case '\'':
                                    if (escapeCount % 2 == 0)
                                        quoteCount++;
                                    /* fall through */
                                default:
                                    escapeCount = 0;
                            }
                        }
                        if (quoteCount % 2 == 1) {
                            // The breakpoint was in a quoted string.
                            continue;
                        }

                        // Only support strings like:
                        //  /**bp**/
                        //  /**bp(name)**/
                        //  /**bp(columnoffset)**/         takes an integer
                        //  /**bp:locals();stack()**/
                        //  /**bp(name):locals();stack()**/
                        //  /**loc(name)**/
                        //  /**loc(name):locals();stack()**/
                        //

                        // Parse the breakpoint name (if it exists)
                        var bpName = undefined;
                        var bpColumnOffset = 0;
                        var bpExecStr = undefined;
                        var parseIdx = 0;
                        if (bpStr[parseIdx] == '(') {
                            // The name and offset is overloaded with the same parameter.
                            // if that is int (determined by parseInt), then it is column offset otherwise left as name.
                            bpName = bpStr.match(/\(([\w,]+?)\)/)[1];
                            parseIdx = bpName.length + 2;
                            bpColumnOffset = parseInt(bpName);
                            if (isNaN(bpColumnOffset)) {
                                bpColumnOffset = 0;
                            } else {
                                bpName = undefined;
                                if (bpColumnOffset > line.length) {
                                    bpColumnOffset = line.length - 1;
                                } else if (bpColumnOffset < 0) {
                                    bpColumnOffset = 0;
                                }
                            }
                        } else if (isLocationBreakpoint) {
                            printError("'loc' sites require a label, for example /**loc(myFunc)**/");
                            return;
                        }

                        // Process the exception label:
                        //   exception(none)
                        //   exception(uncaught)
                        //   exception(all)
                        if (isExceptionBreakpoint) {
                            var exceptionAttributes = -1;
                            if (bpName !== undefined) {
                                if (bpName == "none") {
                                    exceptionAttributes = 0; // JsDiagBreakOnExceptionAttributeNone
                                } else if (bpName == "uncaught") {
                                    exceptionAttributes = 0x2; // JsDiagBreakOnExceptionAttributeFirstChance
                                } else if (bpName == "all") {
                                    exceptionAttributes = 0x1 | 0x2; // JsDiagBreakOnExceptionAttributeUncaught | JsDiagBreakOnExceptionAttributeFirstChance
                                }
                            } else {
                                // throw "No exception type specified";
                            }
                            callHostFunction(hostDebugObject.JsDiagSetBreakOnException, exceptionAttributes);
                        }

                        // Parse the breakpoint execution string
                        if (bpStr[parseIdx] == ':') {
                            bpExecStr = bpStr.substring(parseIdx + 1);
                        } else if (parseIdx != bpStr.length) {
                            printError("Invalid breakpoint string: " + bpStr);
                            return;
                        }

                        // Insert the breakpoint.
                        if (isExceptionBreakpoint) {
                            if (_exceptionCommands != undefined) {
                                printError("More than one 'exception' annotation found");
                                return;
                            }
                            _exceptionCommands = bpExecStr;
                        }

                        if (isOnAsyncBreak) {
                            if (_onasyncbreakCommands != undefined) {
                                printError("More than one 'onasyncbreak' annotation found");
                                return;
                            }
                            _onasyncbreakCommands = bpExecStr;
                        }

                        if (!isExceptionBreakpoint && !isOnAsyncBreak) {
                            if (!isLocationBreakpoint) {
                                bpManager.setBreakpoint(bpName, srcId, bpLine, bpColumnOffset, bpExecStr);
                            } else {
                                bpManager.setLocationBreakpoint(bpName, srcId, bpLine, bpColumnOffset, bpExecStr);
                            }
                        }
                    }
                }
            }
        } catch (ex) {
            printError(ex);
        }
    }

    function handleBreakpoint(id) {
        internalTrace(TRACE_INTERNAL_FUNCTIONS, "handleBreakpoint id: ", id)
        _wasResumed = false;
        if (id != -1) {
            try {
                var execStr = "";
                if (id === "exception") {
                    execStr = _exceptionCommands;
                    if (execStr && execStr.toString().search("removeExpr()") != -1) {
                        _exceptionCommands = undefined;
                    }
                } else if (id === "asyncbreak") {
                    execStr = _onasyncbreakCommands;
                    if (execStr && execStr.toString().search("removeExpr()") != -1) {
                        _onasyncbreakCommands = undefined;
                    }
                } else {
                    // Retrieve this breakpoint's execution string
                    execStr = bpManager.getExecStr(id);
                    if (execStr.toString().search("removeExpr()") != -1) {
                        // A hack to remove entire expression, so that it will not run again.
                        bpManager.setExecStr(id, null);
                    }
                }
                internalTrace(TRACE_INTERNAL_FUNCTIONS, "handleBreakpoint execStr: ", execStr)
                if (execStr != null) {
                    eval(execStr);
                }
            } catch (ex) {
                printError(ex);
            }
        }

        internalTrace(TRACE_INTERNAL_FUNCTIONS, "_commandList length: ", _commandList.length, " _wasResumed: ", _wasResumed);

        // Continue processing the command list.
        while (_commandList.length > 0 && !_wasResumed) {
            var cmd = _commandList.shift();
            internalTrace(TRACE_INTERNAL_FUNCTIONS, "cmd: ", cmd);
            var completion = cmd.fn.apply(this, cmd.args);
            if (typeof completion === "function") {
                _commandCompletions.push(completion);
            }
        }
        while (_commandCompletions.length > 0) {
            var completion = _commandCompletions.shift();
            completion();
        }

        if (!_wasResumed) {
            _currentStackFrameIndex = 0;
            _wasResumed = true;
        }
    }

    function GetObjectDisplay(obj) {
        var objectDisplay = ("className" in obj) ? obj["className"] : obj["type"];

        var value = ("value" in obj) ? obj["value"] : obj["display"];

        if (value && value.length > _inspectMaxStringLength) {
            objectDisplay += " <large string>";
        } else {
            objectDisplay += " " + value;
        }

        return objectDisplay;
    }

    function GetChild(obj, level) {
        function GetChildrens(obj, level) {
            var retArray = {};
            for (var i = 0; i < obj.length; ++i) {
                var propName = (obj[i].name == "__proto__") ? "#__proto__" : obj[i].name;
                retArray[propName] = GetChild(obj[i], level);
            }

            return retArray;
        }

        var retValue = {};

        if ("handle" in obj) {
            if (level >= 0) {
                var childProps = callHostFunction(hostDebugObject.JsDiagGetProperties, obj["handle"], 0, 1000);
                var properties = childProps["properties"];
                var debuggerOnlyProperties = childProps["debuggerOnlyProperties"];
                Array.prototype.push.apply(properties, debuggerOnlyProperties);
                if (properties.length > 0) {
                    retValue = GetChildrens(properties, level - 1);
                } else {
                    retValue = GetObjectDisplay(obj);
                }
            } else {
                retValue = GetObjectDisplay(obj);
            }
            delete obj["handle"];
        }

        if ("propertyAttributes" in obj) {
            delete obj["propertyAttributes"];
        }

        return retValue;
    }

    function compareWithBaseline() {
        function compareObjects(a, b, obj_namespace) {
            var objectsEqual = true;

            // This is a basic object comparison function, primarily to be used for JSON data.
            // It doesn't handle cyclical objects.

            function fail(step, message) {
                if (message == undefined) {
                    message = "diff baselines for details";
                }
                printError("Step " + step + "; on: " + obj_namespace + ": " + message);
                objectsEqual = false;
            }

            function failNonObj(step, a, b, message) {
                if (message == undefined) {
                    message = "";
                }
                printError("Step " + step + "; Local Diff on: " + obj_namespace + ": " + message);
                printError("Value 1:" + JSON.stringify(a));
                printError("Value 2:" + JSON.stringify(b));
                print("");
                objectsEqual = false;
            }

            // (1) Check strict equality.
            if (a === b)
                return true;

            // (2) non-Objects must have passed the strict equality comparison in (1)
            if ((typeof a != "object") || (typeof b != "object")) {
                failNonObj(2, a, b);
                return false;
            }

            // (3) check all properties
            for (var p in a) {
                // (4) check the property
                if (a[p] === b[p])
                    continue;

                // (5) non-Objects must have passed the strict equality comparison in (4)
                if (typeof (a[p]) != "object") {
                    failNonObj(5, a[p], b[p], "Property " + p);
                    continue;
                }

                // (6) recursively check objects or arrays
                if (!compareObjects(a[p], b[p], obj_namespace + "." + p)) {
                    // Don't need to report error message as it'll be reported inside nested call
                    objectsEqual = false;
                    continue;
                }
            }

            // (7) check any properties not in the previous enumeration
            var hasOwnProperty = Object.prototype.hasOwnProperty;
            for (var p in b) {
                if (hasOwnProperty.call(b, p) && !hasOwnProperty.call(a, p)) {
                    fail(7, "Property missing: " + p + ", value: " + JSON.stringify(b[p]));
                    continue;
                }
            }
            return objectsEqual;
        }

        var PASSED = 0;
        var FAILED = 1;

        if (_baseline == undefined) {
            return PASSED;
        }

        try {
            if (compareObjects(_baseline, _eventLog, "baseline")) {
                return PASSED;
            }
        }
        catch (ex) {
            printError("EXCEPTION: " + ex);
        }

        printError("TEST FAILED");
        return FAILED;
    }

    return {
        pushCommand: function pushCommand(fn, args) {
            _commandList.push({
                fn: fn,
                args: args
            });
        },
        debuggerCommands: {
            log: function (str) {
                internalPrint("LOG: " + str);
            },
            logJson: function (str) {
                internalPrint(str);
            },
            resume: function (kind) {
                if (_wasResumed) {
                    printError("Breakpoint resumed twice");
                } else {
                    var stepType = -1;
                    if (kind == "step_into") {
                        stepType = 0;
                    } else if (kind == "step_out") {
                        stepType = 1;
                    } else if (kind == "step_over") {
                        stepType = 2;
                    } else if (kind == "step_document") {
                        stepType = 0;
                    }
                    if (stepType != -1) {
                        callHostFunction(hostDebugObject.JsDiagSetStepType, stepType);
                    } else if (kind != "continue") {
                        throw new Error("Unhandled step type - " + kind);
                    }
                    _wasResumed = true;
                    _currentStackFrameIndex = 0;
                }
            },
            locals: function (expandLevel, flags) {
                if (expandLevel == undefined || expandLevel < 0) {
                    expandLevel = 0;
                }
                var stackProperties = callHostFunction(hostDebugObject.JsDiagGetStackProperties, _currentStackFrameIndex);

                if (expandLevel >= 0) {
                    var localsJSON = {};
                    ["thisObject", "exception", "arguments", "returnValue"].forEach(function (name) {
                        if (name in stackProperties) {
                            var stackObject = stackProperties[name];
                            localsJSON[stackObject.name] = GetChild(stackObject, expandLevel - 1);
                        }
                    });
                    ["functionCallsReturn", "locals"].forEach(function (name) {
                        if (name in stackProperties) {
                            var stackObject = stackProperties[name];
                            if (stackObject.length > 0) {
                                localsJSON[name] = {};
                                for (var i = 0; i < stackObject.length; ++i) {
                                    localsJSON[name][stackObject[i].name] = GetChild(stackObject[i], expandLevel - 1);
                                }
                            }
                        }
                    });
                    if ("scopes" in stackProperties) {
                        var scopesArray = stackProperties["scopes"];
                        for (var i = 0; i < scopesArray.length; ++i) {
                            localsJSON["scopes" + i] = GetChild(scopesArray[i], expandLevel - 1);
                        }
                    }
                    if ("globals" in stackProperties && expandLevel > 0) {
                        localsJSON["globals"] = GetChild(stackProperties["globals"], expandLevel - 1);
                    }
                    recordEvent(localsJSON);
                }
            },
            stack: function (flags) {
                if (flags === undefined) {
                    flags = 0;
                }

                var stackTrace = callHostFunction(hostDebugObject.JsDiagGetStackTrace);
                var stackTraceArray = [];
                for (var i = 0; i < stackTrace.length; ++i) {
                    var stack = {};
                    stack["line"] = stackTrace[i].line;
                    stack["column"] = stackTrace[i].column;
                    stack["sourceText"] = stackTrace[i].sourceText;
                    var functionObject = callHostFunction(hostDebugObject.JsDiagGetObjectFromHandle, stackTrace[i].functionHandle);
                    stack["function"] = functionObject.name;
                    stackTraceArray.push(stack);
                }
                recordEvent({
                    'callStack': stackTraceArray
                });
            },
            evaluate: function (expression, expandLevel, flags) {
                if (expression != undefined) {
                    if (typeof expandLevel != "number" || expandLevel <= 0) {
                        expandLevel = 0;
                    }
                    var evalResult = callHostFunction(hostDebugObject.JsDiagEvaluate, _currentStackFrameIndex, expression);
                    var evaluateOutput = {};
                    evaluateOutput[evalResult.name] = GetChild(evalResult, expandLevel - 1);
                    recordEvent({
                        'evaluate': evaluateOutput
                    });
                }
            },
            enableBp: function (name) {
                bpManager.enableBreakpoint(name);
            },
            disableBp: function (name) {
                bpManager.disableBreakpoint(name);
            },
            deleteBp: function (name) {
                bpManager.deleteBreakpoint(name);
            },
            setFrame: function (depth) {
                var stackTrace = callHostFunction(hostDebugObject.JsDiagGetStackTrace);
                for (var i = 0; i < stackTrace.length; ++i) {
                    if (stackTrace[i].index == depth) {
                        _currentStackFrameIndex = depth;
                        break;
                    }
                }
            },
            dumpBreak: function () {
                var breakpoints = callHostFunction(hostDebugObject.JsDiagGetBreakpoints);
                recordEvent({
                    'breakpoints': breakpoints
                });
            },
            dumpSourceList: function () {
                var sources = callHostFunction(hostDebugObject.JsDiagGetScripts);
                sources.forEach(function (source) {
                    if ("fileName" in source) {
                        source["fileName"] = filterFileName(source["fileName"]);
                    }
                });
                recordEvent({
                    'sources': sources
                });
            },
            trace: function (traceFlag) {
                _trace |= traceFlag;
            }
        },
        setBaseline: function (baseline) {
            try {
                _baseline = JSON.parse(baseline);
            } catch (ex) {
                printError("Invalid JSON passed to setBaseline: " + ex);
                internalPrint(baseline);
            }
        },
        dumpFunctionPosition: function (functionPosition) {
            if (!functionPosition) {
                functionPosition = {};
            }
            else {
                functionPosition["fileName"] = filterFileName(functionPosition["fileName"]);
            }
            recordEvent({
                'functionPosition': functionPosition
            });
        },
        setInspectMaxStringLength: function (value) {
            _inspectMaxStringLength = value;
        },
        getOutputJson: function () {
            return JSON.stringify(_eventLog, undefined, "  ");
        },
        verify: function () {
            return compareWithBaseline();
        },
        handleDebugEvent: function (debugEvent, eventData) {
            function debugEventToString(debugEvent) {
                switch (debugEvent) {
                    case 0:
                        return "JsDiagDebugEventSourceCompile";
                    case 1:
                        return "JsDiagDebugEventCompileError";
                    case 2:
                        return "JsDiagDebugEventBreakpoint";
                    case 3:
                        return "JsDiagDebugEventStepComplete";
                    case 4:
                        return "JsDiagDebugEventDebuggerStatement";
                    case 5:
                        return "JsDiagDebugEventAsyncBreak";
                    case 6:
                        return "JsDiagDebugEventRuntimeException";
                    default:
                        return "UnKnown";
                }
            }
            internalTrace(TRACE_DEBUG_EVENTS, {
                'debugEvent': debugEventToString(debugEvent),
                'eventData': eventData
            });
            switch (debugEvent) {
                case 0:
                    /*JsDiagDebugEventSourceCompile*/
                    var source = callHostFunction(hostDebugObject.JsDiagGetSource, eventData.scriptId);
                    addSourceFile(source.source, source.scriptId);
                    break;
                case 1:
                    /*JsDiagDebugEventCompileError*/
                    var stackTrace = callHostFunction(hostDebugObject.JsDiagGetScripts);
                    break;
                case 2:
                    /*JsDiagDebugEventBreakpoint*/
                case 3:
                    /*JsDiagDebugEventStepComplete*/
                case 4:
                    /*JsDiagDebugEventDebuggerStatement*/
                    handleBreakpoint(("breakpointId" in eventData) ? eventData.breakpointId : -1);
                    break;
                case 5:
                    /*JsDiagDebugEventAsyncBreak*/
                    handleBreakpoint("asyncbreak");
                    break;
                case 6:
                    /*JsDiagDebugEventRuntimeException*/
                    handleBreakpoint("exception");
                    break;
                default:
                    throw "Unhandled JsDiagDebugEvent value " + debugEvent;
                    break;
            }
        },
        handleSourceRunDown: function (sources) {
            bpManager.clearAllBreakpoints();
            for (var len = 0; len < sources.length; ++len) {
                var source = callHostFunction(hostDebugObject.JsDiagGetSource, sources[len].scriptId);
                addSourceFile(source.source, source.scriptId);
            };
        },
    }
})();

// Commands for use from the breakpoint execution string in test files
function log(str) {
    // Prints given string as 'LOG: <given string>' on console
    controllerObj.pushCommand(controllerObj.debuggerCommands.log, arguments);
}
function logJson(str) {
    // Prints given string on console
    controllerObj.pushCommand(controllerObj.debuggerCommands.logJson, arguments);
}
function resume(kind) {
    // Resume exceution after a break, kinds - step_into, step_out, step_over
    controllerObj.pushCommand(controllerObj.debuggerCommands.resume, arguments);
}
function locals(expandLevel, flags) {
    // Dumps locals tree, expand till expandLevel with given flags
    controllerObj.pushCommand(controllerObj.debuggerCommands.locals, arguments);
}
function stack() {
    controllerObj.pushCommand(controllerObj.debuggerCommands.stack, arguments);
}
function removeExpr(bpId) {
    // A workaround to remove the current expression
}
function evaluate(expression, expandLevel, flags) {
    controllerObj.pushCommand(controllerObj.debuggerCommands.evaluate, arguments);
}
function enableBp(name) {
    controllerObj.pushCommand(controllerObj.debuggerCommands.enableBp, arguments);
}
function disableBp(name) {
    controllerObj.pushCommand(controllerObj.debuggerCommands.disableBp, arguments);
}
function deleteBp(name) {
    controllerObj.pushCommand(controllerObj.debuggerCommands.deleteBp, arguments);
}
function setFrame(name) {
    controllerObj.pushCommand(controllerObj.debuggerCommands.setFrame, arguments);
}
function dumpBreak() {
    controllerObj.pushCommand(controllerObj.debuggerCommands.dumpBreak, arguments);
}
function dumpSourceList() {
    controllerObj.pushCommand(controllerObj.debuggerCommands.dumpSourceList, arguments);
}

// Start internal tracing. E.g.: /**bp:trace(TRACE_COMMANDS)**/
function trace() {
    controllerObj.pushCommand(controllerObj.debuggerCommands.trace, arguments);
}

// Non Supported - TO BE REMOVED
function setExceptionResume() { }
function setnext() { }
function evaluateAsync() { }
function trackProjectionCall() { }
function mbp() { }
function deleteMbp() { }

// APIs exposed to Debugger.cpp
function GetOutputJson() {
    return controllerObj.getOutputJson.apply(controllerObj, arguments);
}
function Verify() {
    return controllerObj.verify.apply(controllerObj, arguments);
}
function SetBaseline() {
    return controllerObj.setBaseline.apply(controllerObj, arguments);
}
function SetInspectMaxStringLength() {
    return controllerObj.setInspectMaxStringLength.apply(controllerObj, arguments);
}
function DumpFunctionPosition() {
    return controllerObj.dumpFunctionPosition.apply(controllerObj, arguments);
}


// Called from Debugger.cpp to handle JsDiagDebugEvent
function HandleDebugEvent() {
    return controllerObj.handleDebugEvent.apply(controllerObj, arguments);
}

// Called from Debugger.cpp when debugger is attached using WScript.Attach
function HandleSourceRunDown() {
    return controllerObj.handleSourceRunDown.apply(controllerObj, arguments);
}